The report, based on a national database of bridge inspections maintained by the Federal Highway Administration (FHWA), is the latest update from Transportation for America. On an interactive map, the report displays "structurally deficient" bridges across the country.

Almost 10 percent of Massachusetts bridges are classified as structurally deficient, better than the national average of 11 percent, according to the report. However, while most bridges are designed to stand for 50 years before requiring repair or replacement, Bay State bridges are some of the oldest in the country, averaging 57 years.

Many drivers across the Commonwealth are regularly and unknowingly traveling across bridges that could become dangerous or closed if they are not repaired.

“Even though Massachusetts has taken positive steps to address the most immediate safety needs of its bridges, the stark reality is that there is not enough state or federal funding available to fix all of the structurally deficient bridges listed in Massachusetts today or as the list grows in the future,” said John Walkey, Massachusetts state director of Transportation for America and field director for Transportation for Massachusetts.

Walkey said more state and federal funding is needed to maintain and modernize our bridges.

However, Walkey and Anthony Puntin, executive director of the Boston Society of Civil Engineers, praised the state’s ongoing $3 billion Accelerated Bridge Program, which has fixed more than 100 bridges since 2008.

Puntin said the title, "structurally deficient," does not necessarily mean the bridge is in imminent danger of collapsing, but that repair is needed.

“It is no secret that times are tough, but the safest and most economically viable approach we can take to Massachusetts’ infrastructure is to protect the investments we’ve made with needed safety and structural upgrades,” said Tim Brennan, Executive Director of the Pioneer Valley Planning Commission. “Allowing roads and bridges to slip into disrepair ultimately costs state and local governments billions more than the cost of regular, timely repair."

Walkey said the bridge program has received international attention, but state transposition officials need adequate future funding to continue fixing bridges.

“We have this Lamborghini of a bridge repair program, but no gas in the tank,” he said. ”That gas has to come from either the federal government or the State House.”